CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Surplus [Member]	Surplus [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Treasury Stock, Common [Member]	Treasury Stock, Common [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Accumulated Other Comprehensive Income/(Loss) [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at Dec. 31, 2020	$ 527,122			$ 16,958		$ 326,592		$ (36,477)		$ 221,441			$ (1,392)
Net income	56,622									56,622
Other comprehensive gain (loss)	(10,982)												(10,982)
Restricted stock units issued				251		(251)
Restricted stock units/awards repurchased on vesting to pay taxes	(2,380)			(63)		(2,317)
Amortization of restricted stock awards/units	7,055					7,055
Cash dividends declared on common stock	(3,775)									(3,775)
Shares repurchase	(28,627)							(28,627)
Common stock options exercised	187			14		173
Exercise of warrants				18		(18)
Issuance of shares for Employee Stock Purchase Plan	833			22		811
Issuance of common stock for acquisition	333			20		313
Balance at Dec. 31, 2021	546,388		$ 550,297	17,220	$ 17,220	332,358	$ 332,358	(65,104)	$ (65,104)	274,288		$ 278,197	(12,374)	$ (12,374)
Balance (ASU 2016-13 [Member]) at Dec. 31, 2021		$ 3,909									$ 3,909
Net income	74,246									74,246
Other comprehensive gain (loss)	(61,837)												(61,837)
Restricted stock units issued				290		(290)
Restricted stock units/awards repurchased on vesting to pay taxes	(2,937)			(67)		(2,870)
Amortization of restricted stock awards/units	8,382					8,382
Cash dividends declared on common stock	(3,645)									3,645
Shares repurchase	(32,722)							(32,722)
Common stock options exercised	292			20		272
Exercise of warrants				18		(18)
Issuance of shares for Employee Stock Purchase Plan	904			20		884
Issuance of common stock for acquisition				12		(12)
Balance at Dec. 31, 2022	532,980			17,513		338,706		(97,826)		348,798			(74,211)
Net income	48,854									48,854
Other comprehensive gain (loss)	9,333												9,333
Restricted stock units issued				362		(362)
Restricted stock units/awards repurchased on vesting to pay taxes	(3,243)			(90)		(3,153)
Amortization of restricted stock awards/units	10,751					10,751
Cash dividends declared on common stock	(3,558)									(3,558)
Shares repurchase	(12,494)							(12,494)
Common stock options exercised	42			2		40
Issuance of shares for Employee Stock Purchase Plan	1,016			28		988
Issuance of common stock for acquisition				16		(16)
Balance at Dec. 31, 2023	$ 583,681			$ 17,831		$ 346,954		$ (110,320)		$ 394,094			$ (64,878)